Improvement in monkey-wrenches



W. I-I. GLOVER. Monkey-Wrench.

No. 198,196. Patented Dec.18,1877

FIEIlI ATTEST. INVENTH.

mf. 76.7.@ www 4f/- UNITED STATES PATENT OEEICE;

WILLIAM H. GLOVER, OF ST. LOUIS, MISSOURI, ASSIGN OR OF ONE-HALF HISRIGHT TO WILLIAM L. REYNOLDS AND FREDERICK BEST, OF

SAME PLAGE.

IMPROVEMENT IN MONKEY-WRENCHES.

Specification forming part of Letters Patent No. 198,196, dated December18, 1877; application led November 19, 1877.

To all whom it may concern:

Be it known that I, WILLIAM H. GLovER, of St. Louis, Missouri, have madea new and useful Improvement in Monkey-Wrenches, of which the followingis a full, clear, and exact description, reference being had to theannexed drawings, making part of this specication, in which- Figure l isa view, partly in longitudinal section, of a wrench containing theimprovement; and Figs. 2 and 3 cross-sections taken through the handle,and showing, respectively, the stem of the nut as engaged and asdisengaged in the shank of the movable jaw.

Similar letters refer to similar parts.

By means of the present improvement the jaws of the Wrench can bereadily opened and closed.

In the annexed drawings, A and B, respectively, represent the outer andthe inner jaws of the wrench. The inner jaw is fastened to, and,preferably, made in one piece with, the handle B'. The latter isperforated longitudinally, to receive from its outer end the shank a ofthe jaw A, and from its inner end to receive the stem c of a nut, O,that forms I the tip of the handle B'. The nut is attached to thehandle, so that it can be rotated thereon, but is kept from movinglongitudinally by means of the pins b b, that pass from the handleinwardly, and engage in a groove, c', in the stem c.

The shank a, at its inner end al, is perforated longitudinallyto receivethe stem c. The latter is flattened, and made smooth on two oppositesides, c2 c2, the other two (and opposite) sides, c3 c3, being threaded.The perforation a1 is similarly threaded on two opposite sides, a2 a2,for the threaded portions of the stem to engage therewith, while betweenthe threads a2 a2 it is grooved out at a3 a?, to make a space larger indiameter than that of the threaded portion of the stem. Thus made andarranged, the stem c and shank a can be made to engage, or to disengage,as the-case may be, by turning the nut O one-quarter turn around. Whendisengaged the jawsAB can at once be separated or closed, as desired,and then locked at that point by turning the nut, as described. For, byturning the stem o so that its threaded portions c3 c3 lie in thegrooves a3 a3, as in Figs. l and 3, the shank a can move freely in thehandle B', but, by turning the parts, as in Fig. 2, the stem and shankengage, and the movement of the one part upon the other, inalongitudinal direction, is prevented.

The jawA can, however, be moved in and out slowly, as in the ordinarymanner, by continuously rotating the nut in the proper direction. Thisenables the jaws of the wrench to be accurately adjusted to the Ydesiredopening after they have been approximately opened thereto in the mannerabove set forth. The movement of the shank is conned within suitablelimits by means of a stop, D, engaging in a groove, d, in the shank.

A modication of the above-described con' struction would be to enlargeand perforate the stem c, and to make the shank a engage therein in amanner similar to the engagement of the stem in the shank.

I claim- 1. The herein-described wrench, consisting of the jaws A and B,handle B', shank a, having the grooved and threaded perforation al, andthe nut C, having the llattened and threaded stem c, substantially asdescribed.

2. The combination, in a wrench, of the shank a, having the grooved andthreaded perforation a', and the iiattened and threaded stem c,substantially as described.

3. The combination of the handle B', pins b b, nut C, stem c, having thegroove c1, the smooth sides c2 c2, and the threads c3 c3, and the shanka, having the grooved and threaded perforation al, substantially asdescribed.

WM. H. GLOVER.

Witnesses CEAS. l). MOODY, PAUL BAKEWELL.

